Key to Commonly Abbreviated Spec. Information (all measurements are in inches)CB = Center BackChest 1″ down = means you measure the front of the garment 1″ down from the armhole1/2 = Measure only the front of the garment, then double that measurement to get the total circumferenceRelaxed = Do not stretch the garment if it has elastic to measure, simply leave the elastic relaxed and measureStretched = Stretch the garment if it has elastic to measure, measure stretched